it was in question and it was, in part, because of political decisions that had been made prior to the obama administration, but also because of the economic crisis. >> reporter: from the war on terror to the arab spring, they faced upheavals around the world. what went wrong? >> benghazi went wrong. that was a terrible example of trying to get the right balance between being in a threatening place or not being there. >> reporter: but in retrospect, shouldn't a cable warning of a security threat from an ambassador in a conflict zone, shouldn't that get the highest possible attention immediately? >> well, that's what we're hoping to make sure does happen in the future. >> reporter: she made progress, though fragile, on her lifelong commitment for equal rights for women and girls. >> i worry about extremist groups, fanatics who shoot, you know, teenage girls because they want to go to school. >> reporter: but work for the nonstop clinton came to a halt when she fell, suffered a concussion, blood clot and special eyeglasses. will her health stop her from running for president again? >> i'